VSG-40.5 Indoor High Voltage Vacuum Circuit Breaker – 33kV/35kV/40.5kV Side-Mounted VCB
The VSG-40.5 series is a high-performance indoor vacuum circuit breaker designed for 33kV to 40.5kV power systems. Featuring a robust side-mounted design and a mechanical life of up to 20,000 cycles, it is engineered for frequent operations in industrial plants, power stations, and substations. This VCB provides reliable control and protection for electrical equipment with a rated insulation level of 185kV lightning impulse withstand voltage.
Product Overview
The VSG/C-40.5 Series Side-Mounted Vacuum Circuit Breaker is a cutting-edge indoor high-voltage component designed for three-phase AC 50Hz power systems. With a rated voltage of 40.5kV, it serves as a robust control and protection unit for industrial and mining enterprises, power plants, and substations. Engineered specifically for frequent operations, this VCB combined market demand with a unique design concept to ensure exceptional reliability in demanding medium-voltage environments.
Key Features
-
Exceptional Durability: Boasts a mechanical life of up to 20,000 cycles, significantly reducing maintenance costs over time.
-
High Insulation Level: Features a lightning impulse withstand voltage of 185kV, providing superior protection against voltage surges.
-
Optimized Mechanism: Utilizes the reliable VSG spring operating mechanism for consistent performance under high-frequency switching.
-
Versatile Application: Suitable for 33kV, 35kV, 36kV, and 40.5kV indoor switchgear systems.
Technical Specifications
Main Technical Parameters
| Item | Unit | Data |
| Rated Voltage | kV | 40.5 |
| Rated Frequency | Hz | 50 |
| Rated Current | A | 1250 / 1600 / 2000 |
| 4S Rated Short-time Withstand Current | kA | 25 / 31.5 |
| Rated Peak Withstand Current | kA | 63 / 80 |
| Rated Short-circuit Breaking Current | kA | 25 / 31.5 |
| Rated Operating Sequence | O-0.3s-CO-180s-CO | |
| Mechanical Life | times | 20000 |
Mechanical Characteristic Parameters
| Item | Unit | Data |
| Contact Opening Distance | mm | 18±1 |
| Contact Stroke | mm | 5±1 |
| Average Closing Speed | m/s | 0.8±0.2 |
| Average Breaking Speed | m/s | 1.8±0.2 |
| Closing Time (at rated voltage) | ms | ≤100 |
| Breaking Time (at rated voltage) | ms | 20-50 |
Application Environments
To maintain optimal safety and performance, the VSG/C-40.5 must be installed under the following ambient conditions:
-
Ambient Temperature: -10°C to +40°C (Storage and transport allowed at -30°C).
-
Relative Humidity: Daily average ≤ 95%; Monthly average ≤ 90%.
-
Altitude: Not exceeding 1500m.
-
Seismic Resistance: Earthquake intensity ≤ 8 degrees.
-
Installation Requirements: Site must be free from fire hazards, explosion risks, heavy pollution, chemical erosion, or violent vibration.
Send Us Your Inquiry
We are always ready to assist you! Contact our team for expert support and personalized solutions.